Exception Handling, Java

Exception Handling

I. Java: Lecture 10 | 22:45 min

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Exception Handling

An error that arises through mistakes in coding or through incorrect data entered by the user is called an “exception”
Such errors that are encountered while a program runs are said to be “thrown”
Programmers try to anticipate these errors and either prevent or solve them before they happen
Java uses the “Try... Catch...” process in order to try running a block of code to test for errors and then catch an error if it occurs
All “Try” statements must be followed by at least one “Catch” statement or a “Finally” statement
Exceptions that occur that are not handled by a “Catch” block of code or a “Finally” block will cause a program to terminate

Exception Handling

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

I. Java
	Introduction to Java	31:13
	Working with Java	31:57
	Classes, Objects, and Methods	29:34
	If Logic	34:20
	Loops	37:00
	Modules	33:56
	Arrays	34:03
	Inheritance	28:15
	Polymorphism	36:53
	Exception Handling	22:45

AP Computer Science: Java


Introduction to Java			31:13
	Intro		0:00
	What is Java?		0:12
		Definition of Java	0:13
	Writing a Java Program		3:48
		Example: Converter IO Program	3:49
		Example: Grade Program	8:00
		Example: Writing a Java Program	12:13
	Starting Point of All Java Code		14:00
		'Public Static Void Main'	14:01
	'Public Static Void Main' Syntax		16:07
		Syntax	16:08
		String	16:27
		args	16:41
	How to Add Comments		17:13
		How to Add and Use Comments	17:14
	Java Statements		17:59
		Java Statements and Example	18:00
	Example1: Text-printing Program		18:44
	Example 2: Text-printing on Multiple Lines		20:12
	Example 3: Addition Program that Displays the Sum of Two Numbers		21:11
	Example 4: Program that Determines Calculations of Two Numbers		24:43
	Example 5: Running Programs Through NetBeans IDE		25:50
Working with Java			31:57
	Intro		0:00
	History of Java		0:09
		History of Java	0:10
	Requirements of Java		2:35
		Free to Download & Install	2:36
		System's Path Environment Variable	4:40
	Java's Two-Step Process		5:48
		Create Source File	5:49
		Compile Source File Into Bytecode	6:49
	Java Application Creation		7:35
		Two Main Ways to Create Java Application	7:36
		Other Popular Java-compatible IDE	8:08
	Importing Classes		8:45
		Importing Classes, Example, and Syntax	8:46
	Arithmetic Rules of Precedence		10:02
		PEMDAS vs. P(MDR)(AD)(Java)	10:03
	Four More Program Examples		13:22
		Example: Circle Geometry	14:06
		Example: Searching Through a Text String	19:50
		Example: Doing a Find & Replace	23:35
		Example: Calendar Functions	25:45
Classes, Objects, and Methods			29:34
	Intro		0:00
	Classes, Objects, and Methods		0:09
		Class	0:10
		Object	0:57
		Attributes	1:14
		Method	1:33
		Arguments	1:48
	Instance Variables		2:17
		Instance Variables	2:18
	Set and Get Methods		3:15
		Set and Get Methods	3:16
	Primitive Types vs. Reference Types		4:11
		Primitive Types	4:12
		Reference Type	6:56
	Constructors		7:22
		Attributes of Constructors	7:23
	Example 1: Prints a Table of Squares and Cubes From 0 to 10		8:26
	Example 2: Bank Account Class with Constructor		11:54
	Example 3: Create and Change Account Object		14:14
	Example 4: Bank Account Debit Function		18:44
	Example 5: Debit Account Balance Program		20:08
	Example 6: Hardware Store Inventory & Invoice		22:50
	Example 7: Hardware Store Inventory & Invoice Main Class		26:05
If Logic			34:20
	Intro		0:00
	The Mighty 'If'		0:08
		If Logic and If Statements	0:09
	Conditional Statements in Java		1:44
		If	1:45
		If…Else	2:07
		If…Else If….Else	2:33
		Switch	3:15
	Pseudocode		3:41
		Pseudocode	3:42
		Examples	4:05
	Compound Assignment Operators		6:17
		Compound Assignment Operators and Examples	6:18
	Boolean Logical Operators		9:02
		&& Operator	9:03
		\| \| Operator	9:58
		! Operator	11:38
	Example 1: Program that Determines the Larger of Two Numbers		13:00
	Example 2: Determine the Largest and Smallest Entry		15:55
	Example 3: Determine if a Number is Odd or Even		19:24
	Example 4: Determine if Three Values Could Form a Triangle		21:44
	Example 5: Run Application for Triangle		24:23
	Example 6: Basic If…Else Statement		25:11
	Example 7: Basic If…Else If…Else Statement		26:52
	Example 8: Catch Possibilities if User Enters Invalid Numbers		28:38
	Example 9: Basic Switch Statement		31:10
Loops			37:00
	Intro		0:00
	Types of Loops		0:07
		For Loop	0:54
		While Loop	1:15
		Do…While Loop	1:39
	Increment and Decrement Operators		2:26
		Operators Overview	3:11
		Pre-Increment	4:34
		Pre-Decrement	5:35
		Post-Increment	6:01
		Post-Decrement	6:25
	Counters vs. Sentinels		7:06
		Counters	7:07
		Sentinels	7:40
	Break & Continue Statements		8:46
		Break	8:47
		Continue	9:29
	While Loop Syntax		10:03
		While Loop Syntax and Example	10:04
	For Loop Syntax		11:54
		For Loop Syntax and Example	11:55
	Example 1: Calculate Commissions for Sales Staff		13:55
	Example 2: Program Calculates Average Miles Per Gallon		18:56
	Example 3: Find the Smallest of Entered Numbers		23:30
	Example 4: Return the Lyrics to 'The 12 Days of Christmas'		27:37
	Example 5: Do While Setup		31:50
	Example 6: Break Loop Statement Example		34:21
	Example 7: Continue Loop Statement Example		35:05
Modules			33:56
	Intro		0:00
	Types of Modules		0:09
		Methods & Classes	0:10
		Packages	0:28
	Static Class Members		1:20
		Static Class Members	1:21
		Example of Static Class Members	1:51
	Queues vs. Stacks		3:21
		Queues	3:51
		Stacks	5:06
		Push and Pop	5:42
	Method Overloading		6:05
		Method Overloading	6:06
	The 'this' Keyword		7:13
		'this' Keyword	7:14
		Example	7:28
	Composition vs. Inheritance		8:05
		Composition and Example	8:23
		Inheritance and Example	9:33
	Example 1: Roll a Six-diced Die 10,000 Times		10:53
	Example 2: Program Calculates Charges for Parking Lot		14:47
	Example 3: Test Application for Class Parking		20:30
	Example 4: Program that Converts Fahrenheit to Celsius and Vice Versa		23:43
	Example 5: Program Simulates Tossing a Coin		29:25
Arrays			34:03
	Intro		0:00
	What is an Array?		0:08
		Attributes of Array	0:09
	Types of Arrays		1:10
		Single-Dimensional	1:18
		Two-Dimensional	2:01
	How to Declare an Array		3:15
		Declaring an Array: Single Dimension	3:16
		Declaring an Array: Two Dimension	4:12
	The Enhanced 'for' Statement		5:02
		'for' Statement	5:03
	Passing Arrays to Methods		7:14
		Pass by Value	7:34
		Pass by Reference	7:54
	Example 1: Simple Array		8:24
	Example 2: Program Simulates Rolling Two Six-sided Dice 36,000 Times		9:54
	Example 3: Application Roll Two Dice		14:49
	Example 4: Program Totals Sales for Sales Staff and Products		17:24
	Example 5: Application for Class Sales		21:08
	Example 6: Card Class Represents a Playing Card		24:43
	Example 7: Deck Class Represents a Deck of Playing Cards		26:36
	Example 8: Card Shuffling and Dealing Application		30:35
Inheritance			28:15
	Intro		0:00
	Composition vs. Inheritance		0:07
		Composition & Example	0:17
		Inheritance & Example	1:16
	Composition vs. Inheritance		2:04
		Visual Diagram	2:05
	Inheritance Class Structure		4:36
		Parent Class	4:37
		Child Class	4:51
		Purpose of Inheritance	5:01
	Method Overriding vs. Overloading		6:32
		Method Overriding	6:39
		Method Overloading	7:28
	Inheritance Class Hierarchy		8:01
		Inheritance Class Hierarchy	8:02
	Protected Members		10:27
		Public, Protected, and Private	10:28
	Example 1: Basic Inheritance with Constructors		12:11
	Example 2: Program Exhibits Both Composition and Inheritance		16:03
	Example 3: Class Point Definition		21:07
	Example 4: Class Quadrilateral Definition		22:15
	Example 5: Class Trapezoid Definition		23:09
	Example 6: Class Parallelogram Definition		24:05
	Example 7: Class Rectangle Definition		24:37
	Example 8: Class Square Definition		24:50
	Example 9: Main Application for Shapes Exercise		25:42
Polymorphism			36:53
	Intro		0:00
	What is Polymorphism?		0:08
		Definition of Polymorphism	0:09
	Polymorphism in Programming		1:10
		Superclass	1:11
		Subclass	2:11
		Variable	2:21
		Method	2:31
	Polymorphism in Programming		3:46
		Superclass	3:47
		Subclass	4:16
		Variable	4:22
		Method	4:31
	Abstract Classes vs. Concrete Classes		6:31
		Abstract Classes	6:32
	Abstract Class Polymorphism Example		9:19
		Abstract Superclass	9:20
		Concrete Subclasses	9:58
	'Final' Keyword for Superclass Methods		13:49
		'Final' Keyword	13:50
		Example	14:21
	Example 1: Program to Demonstrate Basic Polymorphism		16:25
	Example 2: Program to Demonstrate Polymorphism with Multiple Subclasses		18:35
	Example 3: Program Tests Shape Hierarchy		25:12
	Example 4: Definition of Class Shape		27:17
	Example 5: Definition of Class Two Dimensional Shape		28:31
	Example 6: Definition of Class Three Dimensional Shape		29:29
	Example 7: Definition of Class Sphere		33:45
Exception Handling			22:45
	Intro		0:00
	What is Exception Handling?		0:09
		Definition of Exception Handling	0:10
	Why Account for Errors?		1:31
		Why Account for Errors?	1:32
	Common Types of Errors		3:51
		User Caused	3:52
		Programmer or System Caused	5:31
	Using the 'Try… Catch' Process		7:30
		Try	7:35
		Catch	8:27
	Try… Catch Syntax		8:51
		Try… Catch Syntax	8:52
	Uncaught Exceptions		9:44
		Handling Uncaught Exceptions	9:45
	Throw' Statement		11:03
		Throw Statement	11:04
		Throw Syntax	11:22
	Example 1: Program to Catch Divide by Zero Error		11:41
	Example 2: Program to Demonstrate Finally Keyword		16:18
	Example 3: Superclass and Subclass Exceptions		19:20

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Exception Handling

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Exception Handling

Exception Handling

AP Computer Science: Java

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